title: Sleep researchers need to bring Darwin on board: elucidating functions of sleep via adaptedness and natural selection.
mesh_terms: D000222:Adaptation, Physiological / Q000235:genetics*; D000818:Animals; D005075:Biological Evolution; D001921:Brain / Q000502:physiology*; D006801:Humans; D012107:Research Design; D012641:Selection, Genetic; D012890:Sleep / Q000502:physiology*; D013045:Species Specificity; D014851:Wakefulness / Q000502:physiology*